Stack Computers (1989) Chapter 5.3: Architecture Of The RTX 32P

>"The Harris Semiconductor RTX 32P is a 32-bit member of the Real Time Express (RTX) processor family. The RTX 32P is a prototype machine that is the basis of Harris' commercial 32-bit stack machine design.

The RTX 32P is a CMOS chip implementation of the WISC Technologies CPU/32 (Koopman 1987c) which was originally built using discrete TTL components. The CPU/32 was in turn

developed from the WISC CPU/16 described in Chapter 4. Because of this history, the RTX 32P is a microcoded machine, with on-chip microcode RAM and on-chip stacks."